Invalid web.xml in continuum-distrubuted-tests module

It doesn't conform to the webapp 2.3 DTD.

Easiest fix is to change it to the 2.4 schema:

Index: src/main/webapp/WEB-INF/web.xml
===================================================================
— src/main/webapp/WEB-INF/web.xml (revision 929328)
+++ src/main/webapp/WEB-INF/web.xml (working copy)
@@ -1,8 +1,7 @@
-<!DOCTYPE web-app PUBLIC

• "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
• "http://java.sun.com/dtd/web-app_2_3.dtd" >
  +<web-app xmlns="http://java.sun.com/xml/ns/j2ee" version="2.4"
  + xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  + xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

-<web-app>
<display-name>Continuum Distributed Build Transport Tests</display-name>

<listener>